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Models / OpenAI

GPT-5.6 Terra

GPT-5.6 · Released 2026-07-09

OpenAI's generally available balanced GPT-5.6 model, positioned below Sol for efficient everyday work at $2.50 / $15 per 1M tokens.

Balanced GPT-5.6 tier for daily coding, research, and agent workflows when Sol's higher price is unnecessary.

#1 of 51 on AA Index · current snapshot
55 AA Index · 10 benchmark rows · 1 sourcesPosition is benchmark-specific — not a cross-family or cross-source ranking.
Composite63
ContextUnlisted
Input / 1M$2.5
Output / 1M$15
Knowledge cutoffunpublished
Output speed157 t/s
TTFT (default API)100.45s
Statussolid
ReasoningCodingAgenticLong context
Reasoning
93
Coding
54
Agentic
88
Long context
74

77average across 4 tested families

Editor's note
Terra moved from limited preview to general availability on July 9, 2026. Independent benchmark rows now cover the family, while OpenAI still has not published the context limit.
Benchmark placements

Where GPT-5.6 Terra places on each public benchmark source that publishes a row. Rank counts every model with a latest row in the same test — not a universal quality score.

BenchmarkFamilyRankScoreSourceDate
AA time to first tokenPerformance#2/ 69Artificial Analysis2026-07-21
Terminal-BenchAgentic#2/ 6988Artificial Analysis2026-07-21
Artificial Analysis Intelligence IndexReasoning#5/ 6755Artificial Analysis2026-07-21
AA-LCRLong context#6/ 6474Artificial Analysis2026-07-21
Humanity's Last ExamReasoning#9/ 6542Artificial Analysis2026-07-21
GPQA DiamondReasoning#10/ 6993Artificial Analysis2026-07-21
SciCodeCoding#12/ 6554Artificial Analysis2026-07-21
AA output speedPerformance#15/ 69Artificial Analysis2026-07-21
τ³-Bench BankingAgentic#24/ 6432Artificial Analysis2026-07-21
IFBenchReasoning#31/ 5771Artificial Analysis2026-07-21
Family context

The three highest-scoring carded models in each capability family. Where GPT-5.6 Terra shows up, it's highlighted.

ReasoningGPT-5.6 Terra · 93
  1. 1
    Claude Mythos Preview
    95
  2. 2
    GPT-5.6 Sol
    94
  3. 3
    Kimi K3
    94
CodingGPT-5.6 Terra · 54
  1. 1
    GPT 5.5
    96
  2. 2
    Claude Opus 4.8
    96
  3. 3
    Claude Opus 4.6
    96
AgenticGPT-5.6 Terra · 88
  1. 1
    GPT 5.5
    100
  2. 2
    Claude Opus 4.8
    100
  3. 3
    Claude Fable 5
    100
Long contextGPT-5.6 Terra · 74
  1. 1
    Kimi K3
    75
  2. 2
    GPT-5.1
    75
  3. 3
    GPT-5.6 Sol
    74
Newest receipts

Benchmark rows added to the public ledger for GPT-5.6 Terra in the last 120 days. Older rows live in the full table below.

10 recent
BenchmarkFamilyScoreSourceDays ago
AA-LCRLong context74%Artificial Analysis2
AA output speedPerformance157 t/sArtificial Analysis2
AA time to first tokenPerformance100.45sArtificial Analysis2
Artificial Analysis Intelligence IndexReasoning55%Artificial Analysis2
GPQA DiamondReasoning92.5%Artificial Analysis2
Humanity's Last ExamReasoning41.8%Artificial Analysis2
IFBenchReasoning71.22%Artificial Analysis2
SciCodeCoding53.9%Artificial Analysis2
τ³-Bench BankingAgentic31.75%Artificial Analysis2
Terminal-BenchAgentic88.01%Artificial Analysis2
Family coverage

A high composite that hides a weak family is a trap. These bars surface the families where this model hasn't been publicly tested, and where it leads.

Reasoning93
Coding54
Agentic88
Long context74
Price vs. performance
0255075100$0.10$0.30$1$3$10$30input USD / 1M tokens · log scale →← intelligence

Hover or tab any dot for name, score, and input price.

AnthropicOpenAIMistralAlibabaDeepSeekGoogleMoonshotMiniMaxxAIMetaZhipuXiaomiMeituanCohere

Full benchmark ledger

Every catalog benchmark for GPT-5.6 Terra. Scores link to the original source; gaps mean no public row exists yet.

10 sourced rows

10 of 32 catalog benchmarks have a sourced row for GPT-5.6 Terra.

Reasoning

Coding

Agentic

Long context

Performance

Changelog
  1. Recorded general availability across ChatGPT, Codex, and the API and refreshed benchmark evidence.
  2. Updated public pricing: Terra is listed at $2.50 input / $15 output per 1M tokens.
  3. Previewed as the balanced GPT-5.6 tier.
Sources